Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7502081 | Reflection type liquid-crystal display device | Seiji Umemoto, Takao Suzuki | 2009-03-10 |
| 7227685 | Optical film and liquid-crystal display device | Seiji Umemoto, Takao Suzuki | 2007-06-05 |
| 7030945 | Liquid-crystal display device | Seiji Umemoto, Ryoji Kinoshita, Yuuki Nakano, Ichiro Amino | 2006-04-18 |
| 6956630 | Reflection type liquid-crystal display apparatus | Hideo Abe, Seiji Umemoto | 2005-10-18 |
| 6917473 | Optical film and liquid-crystal display device | Seiji Umemoto, Takao Suzuki | 2005-07-12 |
| 6882474 | Optical path changing polarizer | Seiji Umemoto, Takao Suzuki | 2005-04-19 |
| 6827457 | Light pipe, planar light source unit and reflective liquid-crystal display device | Seiji Umemoto | 2004-12-07 |
| 6825895 | Liquid-crystal display apparatus | Yuuki Nakano, Seiji Umemoto, Hideo Abe, Ryoji Kinoshita | 2004-11-30 |
| 6822707 | Optical sheet and display device having the optical sheet | Masaya Adachi, Makoto Tsumura | 2004-11-23 |
| 6795136 | Liquid-crystal display device | Seiji Umemoto | 2004-09-21 |
| 6768529 | Reflection-transmission double type liquid-crystal display device | Seiji Umemoto, Hideo Abe | 2004-07-27 |
| 6751023 | Optical film | Seiji Umemoto | 2004-06-15 |
| 6747801 | Optical film and liquid-crystal display device | Seiji Umemoto, Takao Suzuki | 2004-06-08 |
| 6742921 | Light pipe, plate light source unit and reflection type liquid-crystal display device | Seiji Umemoto, Takao Suzuki, Shuuji Yano | 2004-06-01 |
| 6717635 | Liquid crystal display device with a light guide having random v-shaped dots | Hitoshi Taniguchi, Yasuo Hira, Seiji Umemoto | 2004-04-06 |
| 6704070 | Method for manufacturing a light guide plate | Hitoshi Taniguchi, Yasuo Hira, Seiji Umemoto | 2004-03-09 |
| 6700632 | Illuminator apparatus | Hitoshi Taniguchi, Yasuo Hira, Seiji Umemoto | 2004-03-02 |
| 6665029 | Optical path changing film and reflective liquid-crystal display device including same | Hiroyuki Kondo, Seiji Umemoto | 2003-12-16 |
| 6642976 | Glass substrate and liquid-crystal display device | Seiji Umemoto | 2003-11-04 |
| 6636358 | Optical film | Seiji Umemoto | 2003-10-21 |
| 6633351 | Optical functionality sheet, and planar light source and image display apparatus using the same sheet | Yasuo Hira | 2003-10-14 |
| 6616289 | Light pipe, plane light source unit and liquid-crystal display device | Seiji Umemoto | 2003-09-09 |
| 6603520 | Optical film and liquid-crystal display device | Seiji Umemoto | 2003-08-05 |
| 6565224 | Light pipe, surface light source unit and reflection type liquid-crystal display device | Seiji Umemoto | 2003-05-20 |
| 4565236 | Method of and mold for continuously casting steel beam blanks | Tamenori Masui, Hitoshi Ono | 1986-01-21 |